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Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida Overview of Structure of the Adult Skull
Biology 323Human Anatomy for Biology MajorsLecture 16Dr. Stuart S. Sumida
Overview of Structure of the Adult Skull
The developing skull has three component origins:
•Condrocranium (base of skull / braincase)
•Dermatocranium (flat bones of skull)
•Splanchnocranium (bones derived from gill arch elements)
Mode of Germ Layer Formation Origin
Condrocranium Endochondral Mesoderm
Dermatocranium Dermal Neural Crest
Splanchnocranium Endochondral Neural Crest
CHONDROCRANIUM: Bones of the base of the skull.
•Most major cranial nerves escape the skull through these.•Endochondral• Mostly Mesodermal•Include: ethmoid, sphenoid (part), occipital (part) right and left temporal (parts).
orbit II/
Ethmoid
Sphenoid
Petrous temporal
Basioccipital
Flat bones of skull: DERMATOCRANIUM (These and others.)
Gill Pouch Bones: become SPLANCHNOCRANIUM
This lecture will revolve around the early embryology of the vertebrate
skull. One of the landmark achievments in this was the
summary of that topic – based initially the developing embryonic
shark head – by Edwin S. Goodrich. Thus it has come to be known as the
“Goodrich Diagram”.
From Studies on the structure and development of vertebrates by Edwin S. Goodrich, 1958.
If you’re working with the PowerPoint files, save space in your notes to draw here.
Mandible(Lower Jaw)
Skull – Anterior View
Frontal
Anterior
Inferior
Ethmoid
superior lateral
Bones of the Orbit
Skull – Lateral View
Maxilla: Lateral View
Parietal
External
Internal
External
Internal
Temporal
Neonatal Temporal Bone
Skull – Superior View
Skull – Posterior View
Occipital
Inferior
Internal
Skull – Inferior View
Hard Palate
Infratemporal Region
Skull – Internal View
Sphenoid
Occipital
Major Ligaments Near Jaw Joint
Major Ligaments Near Jaw Joint:
Stylomandibular
Sphenomandibular
Bones of the Basicranium
EthmoidSphenoidTemporalOccipital
Ethmoid
superior lateral
Sphenoid
Anterior
Posterior
External
Internal
Temporal
Neonatal Temporal Bone
Sphenoid
Occipital
Dermal Roofing Bones
NasalsFrontal
Parietals
Frontal
Anterior
Inferior
Parietal
External
Internal
Dermal Facial Bones
MaxillaZygomaticLacrimal
Maxilla: Lateral View
Bones of the Orbit
Dermal Palatal Bones
MaxillaPalatineVomer
Hard Palate
Bones of Splanchnopleure
Sphenoid Greater WingTemporal Styloid Process
Middle Ear Ossicles
Sphenoid
Anterior
Posterior
V1
V2
Sphenoid/ anterior view of orbital surface and foramina with associated cranial nerves indicated
III
IVVI Opthalmi
c v.
Opth. a.
Nerve of pterygoid canal ALSO
CALLED VIDIAN NERVE (VII
parasympathetics + sympathetics)
II
V3
Neonatal Temporal Bone
Middle Ear Ossicles
MalleusIncusStapes
